Source: Escape from the Prison Moon, pg(s). 60
A void palm's fronds are fan-shaped and mottled red, and are always in constant motion. When seen in black and white, the pattern on a void palm's fronds resemble a dim, distant field of stars. The typical void palm is 15 feet tall and weighs around 1000 pounds.
When sufficiently big prey approach a void palm, a 20-foot-radius area around the void palm becomes devoid of both non-magical light and gravity, making it difficult for prey to escape, especially after the void palm has swept that area of debris that might be used as handholds or counterbalance.
Once a year, a void palm spends a week to produce a brilliant blue seed from each stalk, then flings them across the universe. These seeds can ignore gravity so they could escape the parent's planet and reach new ones to sprout.